package cnf

import (
	"bytes"
	"testing"
)

func TestNginxGet(t *testing.T) {

	tests := []struct {
		raw string
		key string
	}{
		{"key value;\n", "key"},
		{"section {\n\tkey value;\n}\n", "section.key"},
		{"ignore {\n\tignore xxx;\n}\nsection {\n\tkey value;\n}\n", "section.key"},
	}

	for i, test := range tests {

		parser := new(nginx)
		reader := bytes.NewBufferString(test.raw)

		// try to extract value
		_, err := parser.ReadFrom(reader)
		if err != nil {
			t.Errorf("[%d] parse error: %s", i, err)
			continue
		}

		// extract value
		value, found := parser.Get(test.key)
		if !found {
			t.Errorf("[%d] expected a result, got none", i)
			continue
		}

		// check value
		if value != "value" {
			t.Errorf("[%d] expected 'value' got '%s'", i, value)
		}

	}

}

func TestNginxSetPathExists(t *testing.T) {

	tests := []struct {
		raw   string
		key   string
		value string
	}{

		{"key value;\n", "key", "newvalue"},
		{"section {\n\tkey value;\n}\n", "section.key", "newvalue"},
		{"ignore {\n\tignore xxx;\n}\nsection {\n\tkey value;\n}\n", "section.key", "newvalue"},
	}

	for i, test := range tests {

		parser := new(nginx)
		reader := bytes.NewBufferString(test.raw)

		// try to extract value
		_, err := parser.ReadFrom(reader)
		if err != nil {
			t.Errorf("[%d] parse error: %s", i, err)
			continue
		}

		// update value
		if !parser.Set(test.key, test.value) {
			t.Errorf("[%d] cannot set '%s' to '%s'", i, test.key, test.value)
			continue
		}

		// check new value
		value, found := parser.Get(test.key)
		if !found {
			t.Errorf("[%d] expected a result, got none", i)
			continue
		}

		// check value
		if value != test.value {
			t.Errorf("[%d] expected '%s' got '%s'", i, test.value, value)
		}

	}

}

func TestNginxSetCreatePath(t *testing.T) {

	tests := []struct {
		raw    string
		key    string
		ignore string // path to field that must be present after transformation
		value  string
	}{
		{"ignore xxx;\n", "key", "ignore", "newvalue"},
		{"ignore xxx;\nsection {\n\tkey value;\n}\n", "section.key", "ignore", "newvalue"},
		{"section {\n\tkey value;\n\tignore xxx;\n}\n", "section.key", "section.ignore", "newvalue"},
		{"ignoresec {\n\tignore xxx;\n}\n\nsection {\n}\n", "section.key", "ignoresec.ignore", "newvalue"},
		{"ignoresec {\n\tignore xxx;\n}\n\nsection {\n\tkey value;\n}\n", "section.key", "ignoresec.ignore", "newvalue"},
	}

	for i, test := range tests {

		parser := new(nginx)
		reader := bytes.NewBufferString(test.raw)

		// try to extract value
		_, err := parser.ReadFrom(reader)
		if err != nil {
			t.Errorf("[%d] parse error: %s", i, err)
			continue
		}

		// update value
		if !parser.Set(test.key, test.value) {
			t.Errorf("[%d] cannot set '%s' to '%s'", i, test.key, test.value)
			continue
		}

		// check new value
		value, found := parser.Get(test.key)
		if !found {
			t.Errorf("[%d] expected a result, got none", i)
			continue
		}

		// check value
		if value != test.value {
			t.Errorf("[%d] expected '%s' got '%s'", i, test.value, value)
			continue
		}

		// check that ignore field is still there
		value, found = parser.Get(test.ignore)
		if !found {
			t.Errorf("[%d] expected ignore field, got none", i)
			continue
		}

		// check value
		if value != "xxx" {
			t.Errorf("[%d] expected ignore value to be '%s' got '%s'", i, "xxx", value)
			continue
		}
	}

}

func TestNginxSetCreateEncode(t *testing.T) {

	tests := []struct {
		raw     string
		key     string
		value   string
		encoded string
	}{
		{"ignore xxx;\n", "key", "newvalue", "ignore\t\txxx;\nkey\t\tnewvalue;\n"},
		{"ignore xxx;\nsection {\n\tkey value;\n}\n", "section.key", "newvalue", "ignore\t\txxx;\nsection {\n\tkey\t\tnewvalue;\n}\n\n"},
		{"section {\n\tkey value;\n\tignore xxx;\n}\n", "section.key", "newvalue", "section {\n\tkey\t\tnewvalue;\n\tignore\t\txxx;\n}\n\n"},
		{"ignoresec {\n\tignore xxx;\n}\n\nsection {\n}\n", "section.key", "newvalue", "ignoresec {\n\tignore\t\txxx;\n}\n\nsection {\n\tkey\t\tnewvalue;\n}\n\n"},
		{"ignoresec {\n\tignore xxx;\n}\n\nsection {\n\tkey value;\n}\n", "section.key", "newvalue", "ignoresec {\n\tignore\t\txxx;\n}\n\nsection {\n\tkey\t\tnewvalue;\n}\n\n"},

		{
			"; comment 1\n\nk1 v1;\n#comment 2\nsec1 {\n}\nsec2 {\nignore xxx;\n sec3 {\nignore2 yyy;\n}\n\n}\n\n",
			"key",
			"newvalue",
			"; comment 1\nk1\t\tv1;\n#comment 2\nsec1 {\n}\n\nsec2 {\n\tignore\t\txxx;\n\tsec3 {\n\t\tignore2\t\tyyy;\n\t}\n\n}\n\nkey\t\tnewvalue;\n"},
		{
			"; comment 1\n\nk1 v1;\n#comment 2\nsec1 {\n}\nsec2 {\nignore xxx;\n sec3 {\nignore2 yyy;\n}\n\n}\n\n",
			"section.key",
			"newvalue",
			"; comment 1\nk1\t\tv1;\n#comment 2\nsec1 {\n}\n\nsec2 {\n\tignore\t\txxx;\n\tsec3 {\n\t\tignore2\t\tyyy;\n\t}\n\n}\n\nsection {\n\tkey\t\tnewvalue;\n}\n\n"},
	}

	for i, test := range tests {

		parser := new(nginx)
		r, w := bytes.NewBufferString(test.raw), new(bytes.Buffer)

		// try to extract value
		_, err := parser.ReadFrom(r)
		if err != nil {
			t.Errorf("[%d] parse error: %s", i, err)
			continue
		}

		// update value
		if !parser.Set(test.key, test.value) {
			t.Errorf("[%d] cannot set '%s' to '%s'", i, test.key, test.value)
			continue
		}

		// check new value
		value, found := parser.Get(test.key)
		if !found {
			t.Errorf("[%d] expected a result, got none", i)
			continue
		}

		// check value
		if value != test.value {
			t.Errorf("[%d] expected '%s' got '%s'", i, test.value, value)
			continue
		}

		// writeToBuffer
		_, err = parser.WriteTo(w)
		if err != nil {
			t.Errorf("[%d] unexpected write error <%s>", i, err)
			continue
		}

		encoded := w.String()

		// check value
		if encoded != test.encoded {
			t.Errorf("[%d] wrong encoded value \n-=-=-= HAVE =-=-=-\n%s\n-=-=-= WANT =-=-=-\n%s\n-=-=-=-=-=\n", i, escape(test.encoded), escape(encoded))
			continue
		}

		// try to write
	}

}

func escape(in string) string {

	out := make([]rune, 0)

	for _, char := range in {
		if char == '\\' {
			out = append(out, []rune("\\\\")...)
		} else if char == '\n' {
			out = append(out, []rune("\\n")...)
		} else if char == '\r' {
			out = append(out, []rune("\\r")...)
		} else if char == '\t' {
			out = append(out, []rune("\\t")...)
		} else if char == '\033' {
			out = append(out, []rune("\\033")...)
		} else {
			out = append(out, char)
		}
	}

	return string(out)
}